CVE-2021-4155

A data leak flaw was found in the way XFS_IOC_ALLOCSP IOCTL in the XFS filesystem allowed for size increase of files with unaligned size. A local attacker could use this flaw to leak data on the XFS filesystem otherwise not accessible to them.

CVSS v3.0 5.5 MEDIUM

5.5^/10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=983d8e60f50806f90534cc5373d0ce867e5aaf79	Mailing List Patch Vendor Advisory
https://access.redhat.com/security/cve/CVE-2021-4155	Mitigation Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/01/10/1	Mailing List Patch Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2021-4155	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2034813	Issue Tracking Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Information

Published : 2022-08-24 09:15

Updated : 2022-08-29 06:39

NVD link : CVE-2021-4155

Mitre link : CVE-2021-4155

JSON object : View

CWE

CWE-131

Incorrect Calculation of Buffer Size

Products Affected

linux

linux_kernel

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=983d8e60f50806f90534cc5373d0ce867e5aaf79", "name": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=983d8e60f50806f90534cc5373d0ce867e5aaf79", "tags": ["Mailing List", "Patch", "Vendor Advisory"], "refsource": "MISC"}, {"url": "https://access.redhat.com/security/cve/CVE-2021-4155", "name": "https://access.redhat.com/security/cve/CVE-2021-4155", "tags": ["Mitigation", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://www.openwall.com/lists/oss-security/2022/01/10/1", "name": "https://www.openwall.com/lists/oss-security/2022/01/10/1", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://security-tracker.debian.org/tracker/CVE-2021-4155", "name": "https://security-tracker.debian.org/tracker/CVE-2021-4155", "tags": ["Third Party Advisory"], "refsource": "MISC"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2034813", "name": "https://bugzilla.redhat.com/show_bug.cgi?id=2034813", "tags": ["Issue Tracking", "Third Party Advisory"], "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "A data leak flaw was found in the way XFS_IOC_ALLOCSP IOCTL in the XFS filesystem allowed for size increase of files with unaligned size. A local attacker could use this flaw to leak data on the XFS filesystem otherwise not accessible to them."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-131"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-4155", "ASSIGNER": "secalert@redhat.com"}}, "impact": {"baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 1.8}}, "publishedDate": "2022-08-24T16:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "5.16"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2022-08-29T13:39Z"}

5.5 /10